Manufacturing method of nickel sulfate
I. Introduction
Nickel sulfate is an important raw material for the production of chemicals, which is widely used in electroplating, catalysts, pigments and other fields. In this paper, we will introduce the manufacturing method of nickel sulfate, including raw material selection, reaction principle, production process and operation points.
II, raw material selection
The main raw materials for manufacturing nickel sulfate are nickel and sulfuric acid. The source of nickel can be nickel ore, scrap nickel material or nickel alloy, while sulfuric acid is usually used industrial grade sulfuric acid. In order to ensure the quality of products, the raw materials with higher purity should be selected.
Three, reaction principle
The manufacture of nickel sulfate involves the reaction between nickel and sulfuric acid. During the reaction, nickel reacts chemically with sulfuric acid to produce nickel sulfate and hydrogen:
Ni + H2SO4 → NiSO4 + H2↑
Four, production process
1. Pre-treatment: The nickel raw material is crushed and screened to remove the impurities in it, and to get the suitable particle size.
2. Acid leaching: Add the pre-treated nickel raw materials into sulfuric acid and carry out acid leaching reaction to generate nickel sulfate and hydrogen. The temperature and time of the reaction are controlled to ensure that the reaction proceeds adequately.
3. Filtration: The reaction mixture is filtered to separate the solid residue and nickel sulfate solution.
4. Crystallization: The nickel sulfate solution is subjected to a crystallization operation to obtain nickel sulfate crystals.
5. Centrifugation: The nickel sulfate crystals are separated from the mother liquor by centrifugation.
6. Drying: The centrifugally separated nickel sulfate crystals are dried to obtain the final nickel sulfate product.
V. Operation points
1. Control the reaction temperature and time to ensure that the reaction is fully carried out, while avoiding over-reaction.
2. Maintain proper filtration speed and pressure during filtration to ensure the filtration effect.
3. Control the crystallization temperature and concentration during crystallization to obtain high quality nickel sulfate crystals.
4. When centrifugal separation, select the appropriate centrifuge model and operating parameters to improve the separation efficiency.
5. Drying temperature and time should be controlled during drying to avoid product deterioration or damage.
6. Safety and environmental protection measures
1. In the production process, strictly observe the safety operation regulations to ensure the safety of employees and equipment.
2. For the waste gas, waste water and solid waste generated, effective treatment measures should be taken to meet the national environmental standards.
3. Strengthen the hygiene management of the production site and keep the production environment neat and clean.
VII.Conclusion
The manufacturing method of nickel sulfate involves a number of links and operation points, in order to ensure product quality and production safety, it is necessary to strictly control the process parameters and operation process of each link. At the same time, safety and environmental protection management is strengthened to ensure that the production process complies with national environmental standards and enterprise safety requirements. Through the manufacturing methods introduced in this paper, high-quality nickel sulfate products can be produced to support the development of related fields.
